華司頭內六角內外牙螺母, Model: A71~A84, A71: 3/8' x 25L, 10M x 25L A72: 5/16' x 25L, 8M x 25L A73: 5/16' x 20L, 8M x 20L A74: 5/16' x ... 詳細規格及用途描述.
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